Nissan Pathfinder. Manual - part 513

EC-358

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P1148, P1168 CLOSED LOOP CONTROL

P1148, P1168 CLOSED LOOP CONTROL

DTC Logic

INFOID:0000000009178268

DTC DETECTION LOGIC

NOTE:

DTC P1148 or P1168 is displayed with another DTC for A/F sensor 1.

Perform the trouble diagnosis for the corresponding DTC.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1148

CLOSED LOOP-B1
(Closed loop bank 1)

The closed loop control function for bank 
1 does not operate even when vehicle is 
being driven in the specified condition.

• Harness or connectors

(The A/F sensor 1 circuit is open or shorted.)

• A/F sensor 1
• A/F sensor 1 heater

P1168

CLOSED LOOP-B2
(Closed loop bank 2)

The closed loop control function for bank 
2 does not operate even when vehicle is 
being driven in the specified condition.

P1212 TCS COMMUNICATION LINE

EC-359

< DTC/CIRCUIT DIAGNOSIS >

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P1212 TCS COMMUNICATION LINE

Description

INFOID:0000000009178269

This CAN communication line is used to control the smooth engine operation during the TCS operation. Pulse

signals are exchanged between ECM and “ABS actuator and electric unit (control unit)”.

Be sure to erase the malfunction information such as DTC not only for “ABS actuator and electric unit

(control unit)” but also for ECM after TCS related repair.

DTC Logic

INFOID:0000000009178270

DTC DETECTION LOGIC

NOTE:

• If DTC P1212 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.

• If DTC P1212 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer

to 

EC-353, "DTC Logic"

.

Freeze frame data is not stored in the ECM for this self-diagnosis.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-

ing the next test

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and let it idle for at least 10 seconds.

2. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to 

EC-360, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009178271

Perform the trouble diagnosis for brake control system. Refer to 

BRC-52, "Work Flow"

.

NOTE:

If DTC P1212 is displayed with DTC UXXXX and/or P0607, perform the following trouble diagnosis.

• Trouble diagnosis for DTC UXXXX Refer to 

EC-91, "DTC Index"

.

• Trouble diagnosis for DTC P0607 Refer to 

EC-353, "DTC Logic"

.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1212

TCS C/U FUNCTN
(TCS control unit function)

ECM cannot receive the information 
from “ABS actuator and electric unit 
(control unit)” continuously.

• Harness or connectors

(The CAN communication line is open or shorted.)

• ABS actuator and electric unit (control unit)
• Dead (Weak) battery

EC-360

< DTC/CIRCUIT DIAGNOSIS >

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P1217 ENGINE OVER TEMPERATURE

P1217 ENGINE OVER TEMPERATURE

DTC Logic

INFOID:0000000009178272

DTC DETECTION LOGIC

NOTE:

• If DTC P1217 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.

• If DTC P1217 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer

to 

EC-353, "DTC Logic"

.

If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will

rise.

When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is

indicated.

CAUTION:

When a malfunction is indicated, be sure to replace the coolant. Refer to 

CO-10, "System Inspection"

.

Also, replace the engine oil. Refer to 

MA-27, "ENGINE OIL : Changing Engine Oil"

.

1. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Be sure to

use coolant with the proper mixture ratio. Refer to 

MA-16, "FOR USA AND CANADA : Engine Cool-

ant Mixture Ratio"

.

2. After refilling coolant, run engine to ensure that no water-flow noise is emitted.

DTC CONFIRMATION PROCEDURE

1.

PERFORM COMPONENT FUNCTION CHECK

Perform component function check. Refer to 

EC-361, "Component Function Check"

.

NOTE:

Use component function check to check the overall function of the cooling fan. During this check, a DTC might

not be confirmed.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-362, "Diagnosis Procedure"

.

Component Function Check

INFOID:0000000009178273

1.

PERFORM COMPONENT FUNCTION CHECK-I

WARNING:

Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pres-

sure fluid escaping from the radiator.

Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up

pressure to escape. Then turn the cap all the way off.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1217

ENG OVER TEMP
[Engine over temperature 
(Overheat)]

• Cooling fan does not operate properly (Over-

heat).

• Cooling fan system does not operate properly 

(Overheat).

• Engine coolant was not added to the system 

using the proper filling method.

• Engine coolant is not within the specified 

range.

• Harness or connectors

(Cooling fan circuit is open or shorted.)

• IPDM  E/R
• Cooling fan control module
• Cooling fan motor
• Radiator  hose
• Radiator
• Radiator  cap
• Reservoir tank
• Water pump
• Thermostat
• Water control valve

P1217 ENGINE OVER TEMPERATURE

EC-361

< DTC/CIRCUIT DIAGNOSIS >

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Check the coolant level in the reservoir tank and radiator.

Allow engine to cool before checking coolant level.
Is the coolant level in the reservoir tank and/or radiator below the

proper range?

YES

>> Proceed to 

EC-362, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

PERFORM COMPONENT FUNCTION CHECK-II

Confirm whether customer filled the coolant or not.
Did customer fill the coolant?

YES

>> Proceed to 

EC-362, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM COMPONENT FUNCTION CHECK-III

With CONSULT

1. Turn ignition switch ON.

2. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.

3. Check that cooling fan speed varies according to the percentage.

Without CONSULT

1. Activate IPDM E/R auto active test and check cooling fan motors operation. Refer to 

PCS-8, "Diagnosis

Description"

.

2. Check that cooling fan operates.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-362, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009178274

1.

CHECK COOLING FAN OPERATION

With CONSULT

1. Turn ignition switch ON.

2. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.

3. Check that cooling fan speed varies according to the percentage.

Without CONSULT

1. Activate IPDM E/R auto active test and check cooling fan motors operation. Refer to 

PCS-8, "Diagnosis

Description"

.

2. Check that cooling fan operates.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Proceed to 

EC-422, "Diagnosis Procedure"

.

2.

CHECK COOLING SYSTEM FOR LEAK-I

Check cooling system for leak. Refer to 

CO-10, "System Inspection"

.

Is leakage detected?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

CHECK COOLING SYSTEM FOR LEAK-II

Check the following for leak.

• Hose (Refer to 

CO-10, "System Inspection"

.)

• Radiator (Refer to 

CO-10, "System Inspection"

.)

• Water pump (Refer to 

CO-10, "System Inspection"

.)

SEF621W